Spek makes a high quality gauge with the controller built right in. Checkout their info here http://propartsllc.com/spekGaugeCont...hp?subCatID=20

Im also adding them to the store
http://www.rx7store.net/category_s/500.htm

Some of the key features:
* 7 color background setting with day and night background and pointer dimmer settings
* Lighted High and Low programmable warning settings, background will flash Red if high or low limits are hit.
* Plug and Play wire harness for easy installation.
* 2 Outputs to drive a 2 amp load when set High and Low limits are activated. If a fan option is need Part
* Mounts in standard ProParts Pod or can be used with universal steering column bracket #81102
* PEAK playback and flashing ON/OFF warning background is limits are hit. (This feature can be disabled)
* Brushless stepper motor with full sweep 280 degree pointer
* Patented lighting delivers on e of the largest and biggest displays ever assembled on a 2 1/16 inch gauge
* Easy to read Analog lighted pointer